Παραπομπή APA

Hagerstrand, T., Pred, A., & Haag, G. (1967). Innovation diffusion as a spatial process. Chicago: University of Chicago Press.

Παραπομπή Chicago Style

Hagerstrand, Torsten, Allan Pred, and Greta Haag. Innovation Diffusion As a Spatial Process. Chicago: University of Chicago Press, 1967.

Παραπομπή MLA

Hagerstrand, Torsten, Allan Pred, and Greta Haag. Innovation Diffusion As a Spatial Process. Chicago: University of Chicago Press, 1967.

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